Remark Limiting ourselves to quantum states \(\Psi _{klm}\)  that are the eigenstates of angular momentum with a single excitation is more than just a matter of convenience, it is a matter of strategy. That is, once we make the conceptual leap that such states can be said to describe the properties of a single particle then it will be possible to directly compare our analysis with that of Wallstrom [1]}, whose focus was directed towards particles in quantum mechanics. As we will see in the next section, the conclusions drawn by Wallstrom in this instance cannot be extended to quantum fields.

